Root Cause Analysis

com.atlassian.jira.util.json.JSONException

A JSONObject text must begin with '{' at character 1 of <html>
<head><title>301 Moved Permanently</title></head>
<body bgcolor="white">
<center><h1>301 Moved Permanently</h1></center>
<hr><center>nginx</center>
</body>
</html>